Telephone system.



Patented June 25, 1918.

3 SHEE ISMSHEET l INVENTOR @Y0/1 @en www WITNESSES umane? i., GUHEEN TELEPHONE SYST MPUCWQN man lum.' s.,

WITNESS ES ATTOHN Y 'FRANK L. GOHEEN, or GRoI'sE, IDAHO.

TELEPHONE SYSTEM.

Specification uf Letters Patent. I-"ntented June 25, 1915.

Application lled .Tune 5, 19171 Serial No. 173,001.

Yo all whom t may concern Bc it known that l, Frown L. (tonnes, :L citizen of the United Sintes, residing .fit Grouse, in the count",r of Custer und Stute of Idaho, have invented certain non' und use-- ful Improvements in Telephone Systems, of which the following is n. specification.

This invention has relation to party line telephone systems. and hns 'for un objectto provide :in eppur-utils, und method of wiring the suine 'lor use in subscribers stutions ol :i party line telephone system whereby to prevent s-:iwsdropping ol" unc-ullcll suhsriibrrs upon tho-c f-fnifersing.

Another object ot' the invention is to pro- Ynle un rimini-uur; i'or porti' telephone :qv-- tenis nlurclly .subsvribers of the suine puriy line muy comerse with euch other without! interference, and whereby any subscriber olf u party liuc muy converse with another through the cent1-nl oiire without interference hy :in 'r other 4subscriber ot' the party line.

A still further object of the invention is to provide :in :apparatus tor party line telephone systems whereby the bell ot cach suhscrihers set will he energized when any subscriber is called but whereby only the party called will heplaeed in colnnulnicution with culling sul)s\',:riber, the remaining subscribers being shut out by my apparatus.

A still further object of the invention is to provide means in n party line telephone apparatus of the character above stated whereby the fuct that the party line is in use may he indicated und wherebyv the number of the called subscriber may be known.

n addition to vthe foregoing my invention eomprehends improvements in the details of construction and arrangement of parte to be hereinafter more fully described and particularly set forth in the appended claims.

In the accompanying drawings in which similar and corresponding parts are designated by the saune churucters of reference. throughout the several views in'which they appear- Figure l, is a diagrannnatic View illustrut ing the wiring of u party line telephone system and the method in which. my apparatus 'is incorporated therein und the various parts of the apparatus correlated.

Fig. 2, is s vertical section taken through the apparatus box of a. subseribers set illustrating the parts of my apparatus.

Fig. 3, is n View in spction teken on the line 3&3 of Fig, 2.

Fig. 4, is :t detail section taken on the .line l---Al of Fig. :TZ und Fig. 5, is u detail View of the locking out disk.

With reference to the drawings, particularly Figs. 2 und 3,10 indicates generally the instrument box oi' :t snhscribersset which is mounted upon :i huso board 11 and is provided with the usuel ren'ioi'ahle base plate 12, in the prt-.smit` instance seid. base plate having an opening 13 formed therein. A horizontal shaft 11i provided journaled at its rear end in :i step hearing l5 mounted upon the here-e board 1l. within the instrument box, with the ti'fmt end oi' the shaft jonrnaled centrally in the. disk 16 which is ni unted upon the rear face of the front plate 12 of the instrument box through the. medium of interni extensions 17 formed at uniformi),7 spaced oints upon the periphery oi said disk. A etallic sleeve 18 is en conipessed fomit the shaft 14;, said sleeve however, being shorter thun the shaftso es;

to space the end ct' the riceve inwardly from the ends of the shuft as' indicated. `The sleeve 18 is fiflrtherrnore spaced from the shaft through the provision of a tube 19 ot insulating material interposed therebetWeei'i as indicated. i

Mounted upon the forward end of the sleeve 18 und in spaced relation to the disk l e looking out disk 2O fixedly secured to the sleeve through the medium of a set screw 21Which enters a. central boss formed upon the disk and engages the sleeve. EX- tending parallel to the shaft 14 thereubove is e slidahlerod 22 disposed in close proximity to the periphery of the disk 20 with the forward end of the rod projected 'through a bushing placed upon the front plete 12 of the instrument box and provided' with a button 23 whereby the rod may be reciproeated. Fixe-diy secured to the rod 22 is u. disk 24 which, b engagement with the periphery of the dis 20 serves to preventV inward movement of the rod 22 except when e semi-circular notch 25 formed u on the peripher of seid disk 2O is dispose by rotation o said disk 2O in a position to permit the disk 24 to pass through said notch. The rez-1r end of the rod 22 is guided for movement in n bushing 26 mounted upon the base board 11. A disk of insulating material 27 txoued above.

is also mounted upon the rod 22 adjacent the rear' end of the rod for engagement with a resilient contact tin er 28 mounted upon the inner top side of t le instrument bomaid finger bein-1 adapted 'for engagement with a fin er 29 insulated from the finger 28 ne in icated. i

With reference to Fig. l, of the drawings wherein I have indicated a diagrammatic, View of a party line telephone eye'tem and the embodiment of my apparatus" therein, A. B. and C. indicate subscribers stat `one and'l), indicates the central oice in ont` munication with said subscribers.` 'ith reference te the diagrammatic view, 30 and 31 indicate the main leeds which are connected at the central oflice to a jack 32. The main leads are energized by means of a battery 33 in the central ottico, the current how'- ever tra versing an electromagnet 34; forming' part of a rela-y, vthe armature of which is designated The armature is connected by Ineens of a conductor 36 to the source of current, and when the armature is attracted by the magnet is adapted to place the source of current in mmmunication with a conductor 37 l'xaving e. small lamp ronncctml in series thereto. A. manually operable magneto 39 may be provided for energizing the system to sound the various polarized bells.

Consideringone of the subscribers Stations, 40 indicatee the primary of an in duction coil which is connected at one of its terminals 41 to the main leed 30 and by means of its other terminal to one of the terminals of the secondary 42. 'The other terminal of the secondary ie connected to a receiver 4-3 havin its other terminal placed in communication with a` conductor 45 which is connected at one end to the con nested terminals of the primary and secondary of the induction coil` and at its opposite end to the Contact finger 2S men- The courting contact finger 29 is: laced in eomnniniretion with the transmitter 46 of the set. by means of a conductor 47 having a source of current 48 interposed therein, the other point of connectiony of the transmitter being placed in communication by means of n lead 49 with the main. lead 31 of the system.

The disk 16 mentioned above in each subscribers instrument box is provided with a plurality of paire of circufnfercntially arranged contacts indicated in station A nt 50l und 51", in station B at 50, 51, etc. Re ferring to station A the contact 50 is con nected4 by means of a conductor 52 to the conductor 45 which leads to the conta'et linger 28 as indicated. Il' will oleo be noted that the contact 51 is placed in communication with the main lead 3U of the syetein by means of e conductor Referring to Fig. El of the drawings 54 indicates a contact arm 'which is ixcdly mounted upon the shaft 14 and is adapted for engagement with one of each pair of contacts mounted. upon the disk 1C. A similar Contact arm is also mounted upon the forward terminal of the metallic :sleeve 18 for contact with the other Contact of each pair of said contacts, the arms 54 and 55 being disposed vin angular relation for that purpose. To energize the said arme .ifi and 55, a Contact finger 56 is mounted upon a block 5'? secured to the base part of the instrument and is adapted for frictional contact with the rear end of the sleeve 18, a similar finger 58, mounted in a similar manner upon a block 59 being adapted for friotional contact with the rear end of the shaft 14. As indicated in the diagrammatic View, the arm 54 is placed in communication through the medium of' its Contact ringer 58 with the above mentioned conductor 'ii' through the medium of a lead 60. T he erm is also placed in communication, through the medium of its contact 56 with the main lead 31 of the system by Ineens oft a conductor 61.

Referring particularly to Fig. 3 of the drawings 6'2 designates a ratchet Wheel which is fixedly mounted upon the sleeve 1S. The said ratchet wheel, and conse quently the shaft 14, sleeve 18 and disk 20 and arms 54- and 55 are rotated intermittently by means of an arm 63 fulcrumed as et' 64 upon a plete 65 which is secured to the inner 'face of one vertical wall of the instrument box. The free end of the arm 63 movable in proximity to the periphery of the ratchet Wheel 62 and is provided with a pawl G5 fuicrnmed as at GG upon the said arm 63 for engaging the teeth of the ratchet wheel.. The pawl is held in such engagement by means of' a light spring 67 which engages the paul and which is mounted upon the erm 63, and movement of the paw-l caused by contact therewith. of the spring G? ie limited, by means che lateral extension 68 of the pawl which engages the erm as indicated. An extension 69 is formed i upon the plate and which. projects above the arm 63 for the purpose of carrying an atlpistable stop 70 in the nature of a set screw whiclneogages the arm 63 to limit ,its upward movement, said upward move ment of the arm ,being produced by means of a iight coil spring 71 connected at one end to the erin und its opposite end to an extension formed upon the extension 69. The arm 63 carries an armature 72 which ie in a position to be attracted by an electromagnet 73 mounted upon an extension 74 of the base plete (l5. An arm 75 is extended from the buse plate and carries a pawl 7G for engaging the ratchet wheel to prevent rearward movement thereof, a stop 77 beinnn provided to limit movement of said 'pawl end a spring 7S to retain the pawl in i'i-iiiiuil utliw iw nt' thi"A iiiiililntwl elink 2i. ilfiiiifi illu irfiitri 5M in' i'iftiiiiiiii in iin inuieiil phsitiuii against the. tension nl! the rixsiiuiiit finger 2S, the liutiiiii S3 nii qiiiisii'iiiui' li i.; piisiifeil inward so is tn pirati: iii@ imiilh R5 :Vinci l'. in minimum fiiiiiii.

if .@iiitii'iii 1li iii :":iiiwl tin: liuituii 1m mail imi' iiiiifii, iinii iii; a insult i'liiiicnl" friuli tiiii' iiiitrt'izi'y 32 nf Elu: i'nfiiinl fiiritiiiii is iiiii'niit'tiii. tu pas@ along rin. iniiiii l 55* i iliru vfiviii tu itin iff-ifi Fli nl ^:iiii iiifnigi frliii iniitzui nml Y in tin iwiii inist t'iin auxiliary leiiii Si, and 'fi'niii @new titi-nitidi tplm cmidiictiiis S0 nl miiii ailifiziiiicii L@tut itin in tlie party line` tiii'uuifli iiiiifii irlf'cli-ni'i igiiiiit: T3 iliiii'iin'f. bark tiliruiigili lir niiiii liiui iii. in tiltl sniii'i'ii 0i ifitii'iiil. in titi@ niiiiliwii'ii ilijti'u-rinigiwt @iiiijimiii throughout; this pai-ty line :intl :ii` u. uniisiiiiiini'i tiin izitijiiety wheel till will iw Vuiuiiil thi-Laugh :i iiiitiizil ruvnlutimi in :in iii-- fn-)iis annui, it will tiivi'ifnii in soon tint i fiiii t l :intl 5f) will im i'uiiiiffl tii'uiigfli iriiiiiil i* i'iiiiiiiiin ti) iiispnsil ilie teriiiiinili; iii-Jimi iii milizia-b with the iii'st svt ut miiizintf of nach Stil; ribiiifs. Stfitiun. lflnti-'ifi'iij in-:xti iii ilii presi-nn init-(inw station inw, linnn iwalivii, tiw first nel nf inntiults will iii: viigaigvd iiijif [inl :inns: 1iiiiid 55, and it in only in iliiiini'i A that tlmsi vimini-ts: :uw :i-lii'i. (innig tu the i'iict that t'liiI ilisli el if @iii-ii siiiisi'iibers station liiicv` iioiiii intaie-il. iniinfiing istation l5 {wliii'ii iii the will.- ini: i-iii-iiiii) tinE iliiaii ill nf sind willing; mi #inn will im locked lwliinu ll'iily disk 2O unil uiiyn iniiy thun he iiiiiised, rinvii ig in" iin niviiiiiiiinin kgiving i0 retain 'iiiia iiigei iiiiil itl in niiitiinii fiigiiguniviita Siilir-fi'i'il'uii l having' thus sulei'ti'il liis Stn tion, iw iiiL-iigizis iliii Sysituni ity i1'iiiiiii|1i::- ini! liii ii'iiignitn gan@ iiini il() s0 iis tin wiwi itil tin;u polari-xvid ltifllri. Siiiisciibrir A i'wiiiuiiiiiig in his i'inp; inziiv liinii- :subscriber 1% staving 1,1: tlm iiiirl' tliiii vuiiii iiiiri'iiitS :iiie i up in tiiit ii'iikiiig uiiifiiii'` by'iiioans nf the .ffiii'rifi @tj of st'sitiinn B, said talking ciiA ifiiit ggiriiifemiiiig 'fi-0in said tziniinitl'ci iiii'iiiigiii ilii liiitiiiiy 4R if sind st'zitiun. iiii'iiiigli ilu-e iini'iiluctiir i7 tu the Contact fii- 2?1 through the Contact ngei 2S nml tlio, ffiiiilni'tisr 45, through the primary coil 40, tiiinfi: iiiifiiigli the niiiiii loiid 30 of the sysiini in the primary mi] 40 (if Station A, settiti;A up mcillntiims in tlic` inilui'iioii mil,

iviiiiii :iiu transformed liy means of the Secunilzii'y unil -ii into i'uii'cnts which im ieconwitnd into sound waives by iiinfins nf tlm rvirviwi i il. Following thi.'y cuiiiini` from the giiinmi'y ttt it sliitiiin A,tliuifui'10ntpi'ncivtls fit1-munimiiiliii'tui'io :mid station, tliiniigh e-miiiuvim' tu cnntiiut; 5U, tlnuiigli :vni wim-ning lijf wily of the lend. G1 to tinl iiiiiin iiiiil l of iliia system. bai-k in the tiiiusluit` im' ttt if station ii. Subscriber A muy vonwi'w 'with ritilmri'ilioi B in ii similar iniinnui', iiiiit is Ify moans of variations 0f ciu'l'iiit u; itin circuit set up by thu transmitter i6 of station A. ySeidl'llking circuit proceed'- ing from said transmitter through battery 4:8, conductor 60, through arm 511, into conH tact 51, through conductor 53 to the mein leed 3U' of the system, through conductor 41 anti primary 40 of station B, set-ting up oscillotions in the induction coil which are transittcil into 'the receiver 43 of station B, through conductor 45 to contacts 28 and 529 of station B, through conductor 47, returning to station A by means of the mein lead 31 of the system. Thus, it will be seen, in asmuch as contacts 50 and 5i are olive only in station A, that station is the only one hav ing e` complete listening circuit with stoH tion B, the remaining stations in the party line beingr locked out inasmuch as the button 23 of the remaining station cannot he do pressed because of movement of the disk E@ beyond e, point wherein the notches 25 nrc disposed out of olinement with thc dish 24, of the several stations. Then the nienn tioned subscribers have finished talking, either may return the mechanism to normal position by repeatedly pressing the button 83 until larms 5i and 55 are returned to normal position which will dispose all of the disks 20 with their notches 25 uppermost, in the case of subscriber B, such movement of the disk permitting the disk 24 thereof to pass through the notch thereby permitting disengagement of the fingers 2S and 2S) of scid station. The position of the disks 5&0, arms 5% and 5o, etc., may be known or mode evident by ineens of :in indicating hund lil. which. may he mounted upon the forwurtl extremity of the shaft i4 tor movement over a dini plete 92 which may he placed behind the opening 13 of the front plete of the in- Strun'ient box.

.-'iiny sul'isoribcr on the party Eine :muy cell up central by pressing` the button m so ns u to bring` the contacts 28 and 29 into engage nient whereby :1 circuit will bc estahlisl'ieli from the source of curr-cnt of the central station. through thc moin lczul 3G oi the system. through the lingers 2S :ff/ini Q9 of the culling station, und buck to the source of current at the central station hy means of the return mein leali Si. The magnet 34 in the relzigtv ot the central station will be ener-A gized so :is to attract the armature 555 whereby to create :i circuit, from the source of current 33, through tlm icuii 3G, the armature 533 and conductor 37. through the ineen descent lamp 38, finti buck to the buttery causing seid lamp to glow therebyT indientn ing; the fact that :i subscriber is calling. The calling subscriber of the party line muy tlnis be placed in communication with any party on another line by means of the jock 3Q. It will also he apparent that central muy select any subscriber of the party line hy de pressing u button 83 provided for that purpose so as to energize the auxiliary lend Si whereby to rotate the arms Si und 55 and other elements movable therewith in erich suhscrihers station until the live contact' 50, 5l, ctc., ure engaged in the station selected." It will thus bc apparent that no other subscriber on the party line muy listen because of the fact that the arms 54 anti of such subscribers are not in a position to establish thc circuit, und furthermore be cause thc disk 20 of euch suhscribens set :ire so arranged es to provide depression of any ot' the buttons Q3 to establish n listening wirt-uit. Thus, any psx1-tj.' or the subscriber in :i purty line may have privato conversa,- tion with s party or subscriber outside of thc party line Without interference :is well :is with any subscriber or neighbor of the partyY line without interference.

lllhile I have illustrated and described my invention with some degree of pnlrticularity, l realize that in practice, various alterations thereoif'er may be unido, ontl l therefore reserve the right und privilege of changing the form of the details of construction, or ,otherwise altering the arrangement of the ports without departing from the spirit of the invention, or the scope of the appended claims.A

Hoving thus described my invention, what l claim as new and desire to secure by Letters Potent ,is

l, lo oA party line telephone systenl, the combination with thil moin lends thereof, of n plurality oi! suhscrilicrs sets, each Set inclxuiing u talking end n listening circuit, e switch nt esuli sot for conncctin nr scifi telltinfi" nini lisleiiingf tiri-nits, inzuiunliy controlli-cl menus For :wiuulingf @mill switches, o roll, n jlisl; inning; :i iwi-inhoud notch, 1in eulurgnfnnut on the roll adopted to pass through the mitch to ilisplilso the enlargement :it the opposite sides ot' the disk when said (list: is in n normal position. :in auxiliary loud cxtending between the suhscrihcrs sets, means :It @zich subscriher`s set for controlling encrgizution ot scifi :mxilinry lead, menus at ouch subscrihens set operable by energizetion ot' scifi auxiliary 'lenti for intermittently rotating the disks whereby to dispose the notches out of alinenicnt with the enhufgeu ment thereby preventing return of the switch actuated to open position and for preventing movement of the remaining switches to closed position, and means operable hy rotation of the disks for connecting the talking and listening circuits of the celled subscriber only with the mein lead.

2. In e. subscribers set for s lock out party line telephone system, the combination ot' o shaft mounted for rotation, s sleeve surrounding said shaft :intl insulated theren from, uy plurality of pairs of spaced contacts disposed around the shaft, on erm fixed to said shaft for Contact with one Contact or" pair, n second urni mounted on the sleeve for contact with the other contact of each pair, brushes engaging the sleeve and shaft, Ya disk mounted on the sleeve and having a peripheral notch, a rod slidable adjacent the periphery of said disk, a disk forming an enlargement mounted on said rod, of a size sufficient to pass through the notch when the rod is reciprocated, a second enlargement on the said rod, and a pair of spaced contacts engageable by said enlargement when the rod is shifted whereby to dispose the disk of the rod behind the first mentioned disk, and magnetically operable means for rotating the sleeve and shaft whereby the disk may be rotated to dispose its lnotch out of alinement with the dis of the rod, whereby to prevent return of said rod to former position thereby retaining the contacts in closed position. i

3. A subscribers set ifor lock out party line telephone systems2 including a casin having an opening in lts front wal1,a dia plate covering said opening, and having a cehtral opening therein, a shaft mounted for rotation and extending through said open` ing, a hand carried by the extremity of said shaft for movement across the face of the dial, a disk 'stationarily mounted within the casing, a plurality of pairs of spaced contacts arranged circumferentially around the disk, a contact arm. Xedly carried by said shaft for engagement with one disk of each pair, a sleeve encircling the shaft in insulated relation thereto, a second contact arm carried by the sleeve for enoa ment with the other contacting pair, a dis carried by said sleeve havin f a peripheral notch, a rod slidably mounte in a direction axiall of the disk, a circular enlargement carried by said rod for movement through the notch, a second enlargement carried by the rod, a air of normally spaced contacts engageab e by the second enlargement when the rod is moved, one of said contacts acting to urge the rod forwardly to normally retain the enl-ar ement at one side of the disk, a ratchet wlieel carried by the sleeve, a pawl mechanism for rotating the ratchet wheel, an electrcmagnet for actua-ting the pawl, a contact finger engaging the sleeve, and a second contact finger engaging the shaft.

In testimon whereof I aiiix my signature in presence o two Witnesses.

FRANK L. GOHEEN.

Witnesses:

B. W. HUGHES, Mrs. N. E. BEVER. 

